Trolley-harp.



J. K. PARK.

TROLLEY HARP.

APPLICATION FILED AUG. 16. I915.

l l 85 1 30. Patented May 30, 1916.

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UNITED STATE JOHN K. PARK, or ATLANTIC CITY, NEW JERSEY.

TRQLLEY RP.

Specification of Letters Patent.

Patented May so, 1916.

Application filed August 16,1915. Serial No. 45,716.

To all whom it may concern Be it known that I, JOHN K. PARK, a citizenof the United States, residing at Atlantic City, in the county ofAtlantic and State of New Jersey, have invented certain new and usefulImprovements in Trolley- H'arps, of which the'followingis aspecification.

My invention relates to improvements in trolley harps, an object of theinvention being to provide a harp in which the journal supporting blockscan be adjusted vertically so as to accommodate various'sizes offtrolleywheels.

A further object is to provide an improved construction of trolley harpwhich will be exceedingly strong to withstand the uses to which it isnecessarily subjected, and provide improved mounting for the harp whichpermits it toturn within certain limits.

'With these and other objects in view, the invention consists in certainnovel features of construction and combinations and arrangements ofparts as will be more fully hereinafter described and pointed out in theclaims. I

In the accompailying drawings: Figure 1 is a view in side elevationillustrating my improvements. Fig. 2 is a view in horizontal section onthe line 2-2 of Fig. 1. Fig. 3 is a view in section on the line 3-3 ofFig. 1, and Fig. 1 is a view in section on the line l4 of Fig. 3.

1 represents a tubular trolley pole, and 2 is a casting constituting thesupporting base of my improved harp 3. The base 2 has a shank 4 which issecured within the trolley pole 1, and the upper end of said base ismade with an integral circular platform 5 having concentrically curvedslots 6 therein.

The harp 3 is pivotally connected to the base 2 by means of a screw 7extended through a central opening 8 in the bottom of the harp, andscrewed into a threaded recess 9 in the base.

Depending lugs 10 are fixed to the base and move in the slots 6, so thatthe harp is free to turn within the limits of the slots. The uprightmembers 11, 11 of the harp are provided in their inner faces withdovetailed longitudinal grooves 12 to receive blocks 13, the lattercorresponding in shape in cross section to the grooves, so that theyslide in the grooves, but are held against lateral movement.

Vertically positioned screws 15 project through the base portion 16 ofthe harp, and lnto the grooves 12. The blocks 13 rest upon the upperends of these screws and by adjusting the screws the blocks can beposltloned at any desired vertical adjustment.

Blocks 13 support a journal pin 17, and screws 18 are projected throughlongitudinal slots 19 in the upright members 11 of the harp, and areprojected through openngs 24 in the blocks 13 and into recesses 20 n theournal pins, thereby holding the ournalpins against rotary movement.

21 is a trolley wheel mounted to turn on ournal pin 17 and spaced fromthe blocks by sprmgs 22 secured attheir ends to the blocks and at theirfree ends bearing against the hub of the trolley wheel. By thearrangement of blocks and supporting screws 15, the blocks can bepositioned at an elevation and desired diameter of trolley wheel withincertain limits can be employed.

After the parts are once adjusted, the screws 18 operate to effectuallylock the parts against accidental movement. It will therefore be notedthat with my improved harp I can construct the same relatively strongand can accommodate various sizes of wheel without changing the harp,thus allowing the use of the harp on various railroads in connectionwith any desired size of wheel.

Furthermore, my improved construction of harp permits the wheel tofollow the varying positions of the trolley wire shown at 23 in Fig. l,and is less liable to jump the wire than ordinary constructions in use.

Various slight changes might be made in the general form and arrangementof parts described without departing from my invention, and hence I donot limit myself to the precise details set forth, but consider myselfat liberty to make such changes and alterations as fairly fall withinthe spirit and scope of the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. The combination with a base having a platform at its upper end, withcurved slots in the platform, of a trolley harp having upright forkmembers, said harp pivotally connected to the platform and having lugsthereon projecting into the slots, blocks adjustable vertically in theupright members of the harp, a journal pin secured in the blocks, and atrolley wheel on the journal pin, substantially as described.

2. A trolley harp comprising parallel upright members having grooves intheir inner faces, blocks mounted in said grooves, screws projectingthrough the bottom of the harp and located against the lower ends of theblocks, and a trolley wheel supported by the blocks, substantially asdescribed.

3. A trolley harp comprising parallel upright members having grooves intheir inner faces, blocks mounted in said grooves, screws projectingthrough the bottom of the harp and located against the lower ends of theblocks, a journal pin supported in the blocks, said upright members ofthe harp having slots in their edges, screws projected through the slotsand through the blocks engaging the journal pin, and a trolley wheel onsaid journal pin, substantially as described.

4. A trolley harp comprising parallel up right members having grooves intheir inner faces, blocks mounted in said grooves, screws projectingthrough the bottom of the harp and located against the lower ends of theblocks, a journal pin supported in the blocks, said upright members ofthe harp having slots in their edges, screws projected through the slotsand through the blocks engaging the journal pin, a trolley wheel on saidjournal pin, a support, a screw pivotally connecting the center of thebase of the harp to said support, and means limiting the turningmovement of the harp on the support, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN K. PARK.

Witnesses:

E. HARTNETT, THOS. F. FREwERs.

Qopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

